Bag-machine



W. ROSE.

BAG MACHINE.

APPLICATIONHILLED FEB. 12. 1920.

1,354,339. PatentedSept. 28, 1920.

set

UNITED stares PATENT ()FFICE,

WILLIAM ROSE, OF GAINSBOROUGH, ENGLAND, ASSIGNOR TO ROSE. BROTHEIts(GMNSBOROUGH) LIMITED, OF GAINSBCROUGH, V ENGLAND;

BAG-MACHINE.

To all whom cit may concern:

Be it known that I, W LLIAM ROSE, a subject of the Kin of Great Britain,residing at Albion orks, Gainsborough, in the county of Lincoln,England, have in vented new and useful Improvements in Bag-lilachines,of which the following is a specification.

This'invent'ion relates to apparatus for making paper and like bags, orcontainers, of the kind in which a number of mandrels, or formers, uponwhich the bags, orcontainers, are made, are radially arranged on anintermittently rotatable sleeve, or shaft, each mandrel, or former,being provided with a presser-foot, or bar, and means whereby, it isfirst caused to exert pressure upon the longitudinal seam of a bag, orcontainer, on the mandrel, or former, and then to re lease the pressure,and this invention has for its object to provide improved means foroperating the presser-foct, or bar, which means will readily indicatewhether, or not, the required pressure is "being exerted, and which Wlllalso maintain the pressure for a pre determined time.

ll e will describe our invention with reference to the accompanyingdrawing which illustrates means in accordance therewith or operating thepresser foot, or bar, Figures 1 and 2 showing, in elevations at rightangles to each other, the position of the parts when the presser-foot,or bar, is exerting pressure; Fig. 3 is a similar view to Fig. 2, butshowing the position of the parts when pressure is released. Figs. a and5 are perspective views of details hereinafter referred to. V a I Thesleeve, or shaft, on which the mandrels, or formers, are radiallycarriedmay be mounted in a vertical, horizontahor angular, position, butwe will assume that it is mounted vertieallly,'as shown in theaccompanyingdrawing, so that the mandrels, or formers, rotateintermlttently in a horlzontal plane.

Each of anumber of mandrels, orformers,

l, is rigidly carried onor formed in one with an arm 2, on a sleeve 3,which is, by any known, or suitable, means, caused to be intermittentlypartially rotated on a. shaft 4:- To a bracket 5, or man extension ofthe arm 2, is pivotally connected, by a link 6, the presser-foot, or bar7 The application and release of pressure by the said foot, or bar,

Specification of Letters Patent.

.Application filed February 12, 1920.

- end 11, of the lever 9,

"Patented Sept. 28, 1920. Serial No. 358,242.

7, isefiected by a vertically movable block, or die, 13, which isconnected to the link 6, through a yieldable toggle-lever device,consisting of a lever 8, pivotally mounted on the bracket 5 andconnected at one end 14, to the said block, or die; a bell-crank lever9, pivot'ally mounted on a pin 10, at the free end of thesaid lever 8,and links 12, each of which has one of its ends connected to the and itsother end connected to the link 6. The lever 8, and the bell-crank lever9, are provided with lugs, or the equivalent, 15 and 16, which arecaused to abut (by the action of a spring 17, interposed between aprojection 18, on the bell-crank lever 9, and an arm. 19, on the lever8) when the parts are in the position in which the pressure is releasedas shown in Fig. 3 of the accompanying drawing, but which separate (inopposition to the action of the said spring 17) when pressure is eX-erted, as shown in Fig. 2 of the accompanying drawing, so that by theposition of the said lugs 15 and 16 relatively one to the other it canbe readily observed whether, or not, the desired pressure is beingexerted.

The block, or die, 13 is moved vertically, at the required times, toactuate the aforesaid toggle-lever device, by a reciprocating sleeve 20,(shown separately in Fig. 4 of the accompanying drawing) slidablymounted on the shaft 4, the said sleeve having a pair of outstandingjaws 21 and 21*, between which, when the said sleeve is in its lowestposition, the block, or die, 13, is, at the proper time, carried by theintermittent ro ta-tive movement of the sleeve 3, so that upon theascent of the said sleeve 20, it will carry the said block, or die,upward with it, there by operating the, toggle-lever device which thenacts to release the pressure and .to raise the presser-foot, or bar, 7,from the mandrel, or former, 1, to the position shown in Fig. 3 of theaccompanying drawing. The block, or die, 13, and the resser-foot, orbar, 7, are maintained in the raised position for a sufiicient time topermit of the'removal of the completed bag, or container, from themandrel, or former, 1, and the wrapping, or folding, thereon of furthermaterial for making another bag, or container, after which the sleeve 20and the block, or die, 13 descend and cause the toggle-lever device topress the presser-foot, or bar, 7, onto the longitudinal seam of thebag,or container,

on the mandrel, or former, 1, as shown in Fig. 2 of the accompanyingdraw ng. Dub

110, 50 thatthe sure as aforesaid.

' an annular ing the downward movement of the block, or

'die, 13, the herein-before mentioned lugs, 15

and 16, remain in contact until downward movement of the presser-foot,or bar, 7 1s .arrestedby engagement with the bag, or

container," on" the mandrel, or former, 1, whereupon the bell-cranklever 9, is. then caused, by the links 12, to turn on the pin lever .8.r I r 7 The construction and arrangement of the lever 8, bell-crankleverll, and-links 1-2, are such as to constitutefan efiicient yieldabletoggledever device. andthe-eifect' of the co-acting operation of theseveral members thereof is'such that when'the sleeve 20 has reached thelimit of its'downward 'movemerit, the end 11, of theQbell-crank 9, hasbeen forced,- by the links 12, to approach the fulcrum of the lever 8,and, consequently thelirg 1.5,: on the said bell-crank lever, has beenmoved out of contact with the lug 16, on the lever 8, as beforementioned. By obseriiing the relative positions of the lugs 15 and 16 itcan be readily ascertained whether,

.or not, the presser-foot, or bar,f7, is prop- 41 with a gap l2 thereinthrough which the 'jaws21and 21 on the sleeve 20 pass and descending.The

when ascending l1 and 41 are so arguides, or flanges,

ranged that they are in alinement with the aws 21 and 21 when thesleeve'20 is in its lowest position, so that, upon a movement of partialrotation of the sleeve 3, the block, or die, '13, between the said jaws21 and 21 passes therefrom to between the guides,

or flanges, ll and 41 and is thereby retained in ts lowered pos t on sothat the pressure on the longltudmal seam of the bag 18 mamtained until,by further rotation of the sleeve 8, the block, or die, 13 ,is' returnedto between the jaws 21 and 21 which then ascend through the gap l2 inthe guides, or flanges, and elfect the release of the pres-Side-plat'csil and 41-3 may be provided on the guide, or flange, 41, toprevent rotative movement of the sleeve 20 when in its raised position,and recess llmay be formed in the stationary piece 39'to receive thelower portion of the sleeve' 20.

v lu'gr15, on" the'said bell-crank lever,asmovedawayfrom the'lug'llo, onthe fAny'knownfor suitable means, may be employed for reflecting thereciprocation of the sleeve 20; it is shown, by way 'of'ez-ia ple, inthe accompanying"drawing as'being eflected as follows z-Secured to theshaft 4, by a pin 26, is a boss 25, having pins 3 30, upon which isrotatably mounted anele- "ment consisting of an arm 28carrying an,

antifriction roller 29, and arms 24' and 2% connected by a bridge-piece2T. The free ends of thearms 24: and 2 l jare oivotallconnected, bylinks 23 and :23, pivotally mounted on pins 22 V and 222, respectively,

secured to the sleeve 20. Vlhe antifrietion roller 29 engages with'acam34 securedto shaft'33 rotatably mounted in bearing =32 formed in onewith the boss 25. The

weight of the sleeve 20 and the parts carried thereon tend to maintainthe antifriction roller in engagementiwith th'ecam 34C andthis tendencymay be augmented by a tension spring 35 having one end connected to apin 38, on the arm 24-, and the other end connected to a pin 37', on theend of an arm 35, formed in one with the boss 25. The shaft" 33 may beprovidedwith a collar 4:6 to prevent longitudinal movement of the saidshaft in thebearing 32.

Rotary motion may betransmitted to the shaft 33 by suitable means.

- In the example of'appa ratus illustrated in the accompanying drawingeach of the four mandrels, or formers, is provided with a toggle-leverdevice and an actuating die,

or block, 13, and therefore the sleeve 3 will make four intermittentpartial rotations in makinga complete rotation, so that, at the end ofeach intermittent rotation, each block, or die, will be successivelybrought into position to be raised and loweredby the jaws 2 1 and 21 onthe sleeve 20.

It is to be understood that the invention 'is not limited to the preciseconstruction and arrangement of the parts 'hereinbefore described andshown inthe accompanying drawing, nor to the number of mandrels, or"formers, employed, as modifications may be made without departing fromthe nature of the invention; for example, eight mandrels, or formers,may be employed, inwhich case the sleeve- 3' would -make eight intermitent partial'rotlations in making a complete 'rotatiomand if desired,more "than-one gap 'may-be formed in the guides, or flanges, 41 and llso that pressure'may be released before the respective mandrels, orformers.

have-been carried a complete rotation.

What I claim is: V V

1;'In apparatus for making paper bags, aformer on whichthe bag'is made,a pre'sser foot pivotallyconnected to the former and adapted to pressagainst a bag on the former, meansfor operating said presser foot, andassociated elements indicating the action of thepresser foot; 1

on the former, means for operating said presser foot, and comprising atoggle driver connected to the presser footand having elementsseparating when the presser foot is in operating position.

3. In apparatus for making paper bags, a former on which the bag ismade, a presser foot pivotally connected to the former and adapted topress against a bag on the former, means for operating said presserfoot, and comprising a toggle driver connected to the presser foot andhaving a pair of cooperating members, spring means for pressing the sametogether, and an operating connection between one of said members andthe presser foot to cause the separation of said members when thepresser foot is in operative position.

l. In apparatus for making paperbags, a former on which the; bag ismade, a presser foot pivotally connected to the former and adapted topress against a bag on the former, means for operating said presserfoot, said means comprising a pivoted toggle lever, a second togglelever pivoted to the free end of the pivot toggle lever, a linkconnecting the second toggle lever to the presser foot, andreciprocating jaws operatively engaging the first toggle lever toactuate the same.

5. In apparatus for making paper bags, a former on which the bag ismade, a presser foot pivotally connected to the former and adapted topress against a bag on the former, means for operating said presserfoot, said means comprising a pivoted toggle lever, a second togglelever pivoted to the free end of the pivot toggle lever, a linkconnecting the second toggle lever to the presser foot, andreciprocating jaws operatively engaging the first toggle lever toactuate the same, together with means for maintaining the presser footin bag-engaging position for a predetermined period.

6. In apparatus for making paper bags, a former on which the bag ismade, a presser foot pivotally connected to the former and adapted topress against a bag on the former, means for operating said presserfoot, said means comprising a pivoted toggle lever, a

second toggle lever pivoted to the free end of the pivot toggle lever, alink connecting the second toggle lever to the presser foot, andreciprocating jaws operatively engaging the first toggle lever toactuate the same, together with a cam for operating said reciprocatingjaws, and a fixed guide serving to hold the toggle elements instationary position for a predetermined period when the presser foot isin engagement with the bag on the former.

In testimony'whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

WILLIAM ROSE.

\Vitnesses IA. SPIKIN, FRANK FOSTER.

